Apparatus for mixing concrete.



o. 894,749. PATENTED JULY 28, 1908., A. VON SILLER.

APPARATUS FOR MIXING CONCRETE;

APPLIQATIONIILBD JULY 31,1907.

' 2 SHEETSSHEET'1 No. 394,749. I PATENTED JULY 28, 1908.

A. VON SILLER. APPARATUS FOR MIXING GOINNORETE.

APPLICATION FILED JULY 31,1907.

2 SHEETS-SHBET 2.

Zluuentoz citizen of the United States, residing at ,lrVashington, District of Columbia, have inmanner' that 'the material to be mixed is from the u per to the lower hopper is conplis' this result.

are frontand side elevations respectively, of

a modification.

- j -for automatically opening the same.-

- with 'a'closure c'oinpr singapair ofhorizon The'material is placed in one of the hoppers ,-wh1ch 1s then raised and when directly above tom, -whereupon the mixture is dumped v ishad, the distance between the hoppers be- .-ther eof.' Fig. 6 is a section on the line '6'6 ,ofFlg. 4.- Fig. 7 is a bottom plan view show- IINITED STATES PATEN T OliFICE.

ALFRED VON SILLER, OF WASHINGTON, DlS'lltICl Oi GOI JUMBIA.

APPARATUS FOR MIXING CONCRETE.

Specification of Letters Patent.

Patented July 28, 1908.

Application filed July 31, i907. Serial No. 386,326.

To all whom it may concern:

Be it known that I, ALFRED VON SILLER, a

vented certain new and useful Improvements in, Ap aratus for Mixing Concrete, of which the following is aspecification.

I This invention relates to that type of concrete making apparatus known as gravity mixers, and has for its object an apparatus of this kind embodying certain novel features of construction, to be hereinafter des ri bed and claimed. Gravityrmixers require a structure of considerable height in order thatthe necessary number of drops may be had, and the present invention is designed to overcome the objections to such structures, among which may be mentioned their great cost as well as their.. immobility. p In carrying out my invention Lemploy two hoppers which are mounted in such a dumped alternately from one into the other.

the other hopper, the material-is automatically dumped thereinto. The'lattei hopper is then raised and'at the same time the first mentioned hopper takes its place at the botthereinto. This transfer 'ofthe material tinu'ed untr a thorough and perfect mixture rug-such that the material will have sufficient dro to effectually and expeditiously accom- 5111' the accompanying drawing Figure 1 isanjelevationof themve'ntion. Figs. 2 and 3 Fig.4 is a front elevation of the apparatus shown in Fig. 1 drawn on an enlarged scale. Fig, .5 is a side elevation ingthe closure for the hoppers and the means thc.dra3vings',i 10 "one-tee a hop er haw 1 mg at the bottom -a discharge spout providedtally-swinging doors'll arranged below the mouth of the spout. Th'e [doors are con-- nectedto; operating levers .12: which are crossed and pivotally connected as indicated at .13 to a bracket 1.4 secured to :the outside of the hopper. To the levers l 2 are fastened.

16' the ourpose of which is to hold the doors nori'nally closed. 'l.-w 'i hoppers constructed herein descrilmd are en'iplcyed, the other hopper being indicated by the reference number 1.7. This hopper also has a closure 18 constructed in the Silll'iti manner as the one for the other hopper.

The'hoppers are spaced. apart a suitable distance and connected by links 19. At the top of the hoppers, on opposite sides thereof, are trunnions 20 which fit loosely in openings in the'ends of linkswhereby the latter are connccted'to the hoppers. v v

The hopper 10 is'suspendcd in a bail 21 the flbra'nchesof/ which are secured at their ends todisks22 mounted on the trunnions 20.

The hopper 17 is aisosuspended in. a bail 23" the branches of which are secured-to disks 24 mounted on the trunnions 20 of said hoppert The bails 21 and 23 are attached to the cables 25 and 26 respectively, of a hoisting apparatus. In the drawings a derrick 27 -is shown, but any other suitable hoisting apparatus may be employed. 1 I

The spacing links 19 are T-irons with their ribs 28 outwardly presented, and adjacent the disks 22, the ribs of said T-irons are-cut brackets 15 which are connected by a spring away so that the disks m ay be placed close to the remaining portions of the T-irons. The bails 21 and 23-are angle-irons arranged so that one of the flanges thereof extendsipara-llel to the ribs 28 and in contact therewith when the hoppers are in superposed position.-

In use, the material'to be mixed is placed in the hopper .10 which is shown at the bottom in the-drawings. The cable 25 is then wound up and, the cable 26 is paid out which elevates the hopper l0 and lowers the hopper 17. The cm'nmcncement'of this -movement their ribs 28 also serve as a stop to t ie swing of the hoppers. at a position directly above e o 3131:1 17 the flange nF the hall 2.5 engages the ribs 28 of the links .19 which stops the swing of the hoppers; At the same time the doors 1-1 of the hopper automatically open and the i'naterial falls by' gravity into the hopper 17. When the up- 'per hopper is emptied, the relative position of the hoppers is reversed by lowering the upper hopper and elevating the lower hopper.

of the hoppers is illustrated in Fig. 1. The a links 19 hold the hoppers spaced apart and When the hop )cr 10 a TiYQs This occurs when the hoppers are in superhereby t .crete can be economically and expeditiously quantit oi concrete is required, and where a .tion opposite to 'tomatic. The operation is as follows: The

assisted and insured by the spring 16.

-mix the material and the expense of a cumberso'me and costly supporting which may be supportedon a wagon-bed 35 .wherebyaporta This elevates the material and it is dumpe into 'the lower, hopper as before. The second swing of the ho pers is in adirec-. that of the first swing .by reason of the fact that the flange of the ball 23 cannot pass the ribs 28 of the links 19. The hoppers do not make a complete revolu tion, but oscillate in a radius of 180 degrees. The transfer of the material from one hopper into theother is continued until the material is sufiiciently mixed. The opening and closing of the door is anleve'rs 12 project outwardly sufficiently so that they canstrike the edge of the links 19;

posed position, Thelevers of the upper hopthe parts are so designed that the levers s the doors fully open when the hoppers are ectly opposite'each other vertically. descends, the levers fingers 29 projecting from the links e levers are swung in the direction to close the doors, which movement is By the apparatus herein described conmanu factured. The hoisting a paratus WhlOll is employed to dump the finis ed concrete in the desired places, can be used to frame 1s saved. The concrete can be manufactured close to the place where it is to be used, and the entire apparatus can be readily moved from one place to another. with the derrick. The, cost of the apparatus is small and no specially ,constructed hoisting apparatus is necess a A rnodified form of mixin apparatus is shown in Figs. 2 and 3. his. apparatus comprises a pair of hoppers 30 connected and spaced aplart by links 31' as in'the first instance. he links have trunnions 32, which are mounted in bearings 33 on standards 34 e apparatus is had. The operation is as before a worm-gear 36 or other suitable means being provided for swinging the hoppers. This form of apparatus is intended to be used where only a small wheels apparatus is desirable.

Other modes of a plying the principle of my invention may employed instead of the ones herein described, wit out de arting from the spirit of the invention, and do not wish to limit myself to the exact construction and arrangement. herein described,

I claim:

I. In a concrete mixer, the combination of spaced receptacles, means for reversing the relative vertical positions thereof, and means tical positions,

contents of-the upper hopper to. discharge into the lower onec a 3. In a concrete mixer, .the combination of,

associated with said receptacles for auto matically discharging the contents of theupper receptacle into the lower receptacle.

2.]In a concrete mixer, the combination of hoppers, the ho pets for spacing the same apart, means or raisingeach hopper over the-other in alternation, to reverse their relative verand means for allowing the a-vertically turning frame', 'rec taclespivp g ks pivotally connected to otally carried at opposite ends 0 said frame, means for turning said frame to reverse the.

relative vertical positions of the receptacles;

and means associated with said receptacles for discharging the contents of the upperone into the lower one.

4. In a concrete mixer, the combination of a plurality of receptacles, means for varying the relative elevations thereof to place one;

above another in succession, and me'ans-associated withjsaidreceptacles for succes-f sively discharging the contents of an upper receptacle into a'lower receptacle.

5. A concrete mixer, consisting of a frame comprised of links, buckets hung between thel opposite ends of said links means connected to said links for alternatel connected with said receptacles for allowing means I Y ng g on of,

.said receptacles above the other, an

the discharge of material from one receptacle to the other. I

6. Ina concrete mixer the combination of spaced receptacles having discharge openings and closing devices therefor, means'for al- -ternately moving each receptacle'to position-21' over the other, and-means for-actuating theclosing means theother to dum the contents of the upper receptacle into the lower receptacle.

'hen one receptacle isgover.

7. In a, concrete mixer, the combination of spaced receptacles having discharge openings and closing devices therefor, meansfor al- ,ternately moving each rece over the other,- and means actuating the closing means when one recep- 'tacle toposition tacle is over the'other to dum the .contents of the upper receptacle into-t e lower receptacle.'

8. In a concrete mixer, in combination, a

.110 I or automatically.

pair of hoppers, rigid spacing links. between th hoppers for holding the s -Put, g

hoistingdevice connected toeachho pe'rand arranged to lift each hopper above t e other, in alternation, and means for allowing the discharge of material from the upper hopper to the lower hopper.

In testimony whereof I afiix my signature,

in presence of two witnesses. V p

r p ALFRED VON SILLER.

Witnesses:

M. A. Sonmn'r, I MARGARET R. WILSON. 

